关键词: 纬度, 纬度

Abstract:

Pinus tabulaeformis and Quercus mongolica mixed forests were regional characteristic zonal plant community in Shenyang, we should follow the species composition and structure law of zonal plant community when the plants were built in urban landscape. Therefore, the research on species composition and community structure of Pinus tabulaeformis and Quercus mongolica Mixed Forests was the guiding significance to urban landscape construction in Shenyang. Applying the releve method to species composition and community structure could reach the conclusions of relevant indicators. In tianzhushan of shenyang, Pinus tabulaeformis and Quercus mongolica Mixed Forests had 122 species of seed plants, belonging to 38 families and 72 subjections. Through analysis and comparison of significant value, the main dominant species in arbor layer were Pinus tabulaeformis、Quercus mongolica、Quercus liaotungensis Koidz and Fraxinus rhynchophylla Hance. The dominant species in Shrub layer were Lespedeza bicolor Turcz, Corylus heterophylla Fisch, Indigofera kirilowii Maxim．ex Palib．and Sambucus williamsii Hance. The micryptophytes were accounted for 38.12%, phanerophytes for 27.64%, cryptophytes for 22.87%, therophytes for 8.1% and chamaephytes for 3.27% by analysing the life forms. Vertical structure of Pinus tabulaeformis and Quercus mongolica mixed forests were divided into arbor, shrub and herb, the shrub layer had less advantage than the arbor and herb. The characteristics of the horizontal structure was that the similar plants were a uniform sheet, while the various plants were mixed among the species in a poor condition. The canopy density of arbor layer was 0.75, coverage of shrub and herb layer was 0.27 and 0.46 respectively.